Describe the bug
Hi, As figure 1 and 2, my code and data all use this website approvide, but outcome geratly different.
So, what went wrong?
By the way, I study with your youtube video and the result is not the same, result as in Figure 3.

To Reproduce
Steps to reproduce the behavior:

ovarian_slide = Slide(ovarian_path, processed_path=PROCESS_PATH_OVARIAN)
grid_tiles_extractor = GridTiler(
   tile_size=(512, 512),
   level=0,
   check_tissue=True, # default
   pixel_overlap=0, # default
   prefix="grid/", # save tiles in the "grid" subdirectory of slide's processed_path
   suffix=".png" # default
)
grid_tiles_extractor.locate_tiles(
    slide=ovarian_slide,
    scale_factor=64,
    alpha=64,
    outline="#046C4C",
)

Expected behavior
My outcome is eqaute with this website(https://histolab.readthedocs.io/en/latest/quickstart.html)

Screenshots
Figure 1：

Figure 2：

Figure 3:

Software (please complete the following information):

• OS: Win11
• Python Version: 3.8
• histolab version: histolab-0.5.1-py3-none-any

Additional context
Add any other context about the problem here.